Improvement in machines for bending metal plates



Z Sheets-Siheet I. C. A. TEAL.

MACHINE FOR BEND'ING METAL PLATES. No. 173,689. Patented Feb. 15, 1876.

NPETERS PHOTO-LITHOGRAFHER, WASHINGTON, D. 64

2 Sheets-Sheet 2. C. A. TEAL. I

MACHINE FOR BENDING METAL PLATES. No.173,689. Patented Feb;15,1876;

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JlmflWM/M c "i N. PETERS. PHOTO-LITHOGRAPHER, WASHINGTON D C UNITEDSTATES PATENT UFFICE.

' CHARLES A. TEAL, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MAC HlNES FOR BENDING METAL PLATES.

Specification forming part of Letters Patent-No l73,689, dated February15, 1876; application filed December 1, 1875.

To all whom it may concern Be it known that LOHARLES A. TEAL, of thecity and county of Philadelphia and State of Pennsylvania, have inventeda new and useful Improvement in Apparatus for Bending Metal; and I dohereby declare the following to be a clear and exact description of thenature thereof, sufficient to enable others skilled in the art to whichmy invention appertains to fully understand, make, and use the same,reference beinghad to the accompan yingdrawings, making a part of thisspecification, in which- Figure l is a front view of the apparatusembodying my invention. Fig. 2 is a central longitudinal verticalsection thereof. Fig. 3 is a horizontal section of the housings and planView of the rolls. Fig.4 is a side elevation. Fig. 5 is a top view of adetailed portion.

Similar letters of reference indicate corre sponding parts in theseveral figures.

My invention relates to an apparatus for bending metal of cylindrical ortaper form;

, ing may be readily, cleared of the journal. It

also consists in mounting one journal of a roll in a hinged bearing,whereby the roll may be readily tilted for taper work. It also consistsin an auxiliary bearing for preventing falling of the tilting roll. Italso consists in a sliding shackle adapted to lock the yoke in positionand provide means for conveniently unlocking the same.

Referring to the drawings, Arepresents the frame or housing on which aremounted rolls B O O, which receive power in any suitable manner. To thebase or other proper portion of the frame or housing there is jointed ayoke, D, in the upper part of which there is fitted a verti cally-adjustable bearin g, E, for one journal, A ofthe upper roll B, the otherjournal,A bein g mounted on a bearing, F, which is hinged to avertically-adjustable block, F, fitted in the frame on the sideoppositeto the yoke D, the adjustment being accomplished by means ofscrews G, in well-known manner.

The bearin g E is made in two parts or sections, which consist of thebearing block proper a, and a sliding part, a; which latter is adaptedto be raised and lowered by means of an eccentric rod, H, which isfitted to said sliding part a, and has its hearings in the block a.

In order to permit the eccentric rod'H to move with the bearings E inits vertical adj ustments, the sides of the yoke are all slottedtransversely, as at b, and the ends of the rod project through saidslotsb, one end of the rod being conveniently accessible for operation.

To the lower portion of the frameor housing, at the side adjacent to theyoke D, there is secured a sliding shackle, J, for the yoke; whichshackle consists of a bar, having one end pivoted to the frame orhousing and its other end formed with, a head, 0, carrying a screw, 0.On the upper face of the lower wall of the slot or passage in which thebearing ,E is located,

there is an inclined face, 6, extending horizontally, and having itshighest point toward the outside of the yoke, said face being soarranged that, at a proper time, thehead c of the shackle will ridethereon and engage with the yoke.

The inner end of the shackle has laterallyprojecting'lugs f, which arefitted in longitud inally extending guides 9, attached to the lhousing,said guides permitting sliding motions of the shackle. From the frame orhousing there rises a housing, D, which receives a verticallyadjustableblock, L, and against the lower face thereof the end of the journal A ofthe rollB comes to a bearing, for which purpose said journal is extendedbeyond the bearing F, as more clearly shown at A, Fig. 2.

The operation is as follows: The rolls will be properly adjustedrelatively to the thickness of the plate to be passed between them; andwhen the bending is accomplished, it is necessary to remove the plate.For this purpose, the screw c of the shackle J is loosed and the shackleelevated, so as to be disengaged from the yoke D, said shackle beingthen moved in so that both hands of the workman are free for subsequentmanipulations. The yoke may now be swung outward and-downward on itsaxis and moved clear of the journal A, whereby the yoke aflcrds noobstacle or stop to the removal of the bent plate. Owing, however, tothe axial motion of the yoke and the concentric bearings of the journalA,

the-latter will bind in the bearings. To prevent this is the object ofthe sliding part a of the bearing E. The eccentric rod H is rotated soas to lower the said sliding part a of the bearing E; and it will beseen that this elongates the opening in which rotates the journal A,consequently, when the yoke is swung out or opened, the hearing willfully clear itself of the journal A. The yoke is then lowered, and itwill be seen that the roll B has lost its support on one end or journal,and as the other journal is fitted in the hinged block F, the roll willdrop; but the extended portion A of the journal A has a bearing againstthe block L, whereby the roll will be properly held or supported. Afterthe plate has been removed, the yoke will be raised or closed. In thismovement the head 0 of the shackle J rides freely over the inclined facea I plates in taper form by properly operating the screw G so as to tiltor incline the roll B. In this movement, the bearing F of the journal Aturns on its axiswithout disturbing the housing or bearings of the otherrolls. v The bearing-E of the journal A conforms to the incline of theroll, the lower end of the screw G being freely swiveled to said blockE, so as not to interfere with said conformation, and the slot 11 havingsufficient width as not to cause binding of the rod H against the wallsthereof.

The rod H will be provided with stops to limit the rising and loweringmotions of the sliding part a of the bearing E.

Having thus described my invention, what I claim as new, an d desire tosecure by Letters Patent, .is-

1. The hinged yoke D in combination with the bearing E, provided withthe sliding part a. operating as described and for the purpose setforth. 4

2. The combination of the rolls 0 B, the latter being supported at oneend in a hinged bearing,'F, in the adjustable bearing block F,substantially as and for the purpose set forth.

3. The roll B, having the extended axis A, in combination with thebearing F F and auxiliary bearing L, substantially as and for thepurpose set forth.

4. The combination with the housing and hinged yoke of the shackle J,formed with laterally-extending lugs, and the longitudinally-

